R help - Oct 2005 - creating a matrix of "objects"

Dear R,

I??m really new to R, so it could be that my 
question is one of those "read the manual" ones.
But I did that and found nothing.

Problem: I need to get a "matrix" of "datapoints".
         Each datapoint has to contain tree attributes.

trials like:


make.LDmatrix <- function(nrbases){

b1 <- list(sum=NA, sqrsum=NA, hits=NA)
result <- list()

for(i in seq(1,nrbases)){
	for(j in seq(1,nrbases)){
		result[[i]][[j]] <- b1
}}
result
}



did not work because of a "out of bound" error.

It would be very kind if someone could help me with this.

Thanks, Andy

-- 
Highspeed-Freiheit. Bei GMX superg??nstig, z.B. GMX DSL_Cityflat,

> Problem: I need to get a "matrix" of "datapoints".
>          Each datapoint has to contain tree attributes.
Have you tried:

m <- matrix(list(), nrbases, nrbases)

?  You would then index it using m[[i,j]].    A list is a basic
vector, so you can make a matrix with it, just as you can with a
vector of numbers.

Hadley